Getting The ListBox To Display Member?
Dec 19, 2009
I've set my DisplayMember property of the listbox to the property I want yet when I add the objects to my listbox it "fails" and instead uses the .ToString of the entire object which doesn't return what I want.
[URL]
the DisplayMember only works if your listbox has a datasource. Well I'm not using a DataSource, like that guy I'm just using .Add. So how do I get DisplayMember to work without using a DataSource?Also I tried putting all of the objects (their simple item structures) into a List Of and then set that list as the DataSource to the ListBox and it actually added all of the objects to the listbox however the DisplayMember still didn't work and all I got where the results of Object.ToString().
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Oct 11, 2011
I received this function to get groups a user is member of.
Private Function GetRoles(ByVal user As String) As String()
Dim propertyCount As Integer
'Initialisation du tableau avec 10 String ""
[code]....
, it displays only one line with a String[] Array value.
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Jan 6, 2011
I have 2 tables Table A & Table B Table A has the table values that I want to be populated in a datagridview control.The challenge is that column 1 in table A contains an ID(foreign key) to a name field that is a located in table B. I need the datagrid to have the first column be a combobox that displays the names(from Table B) that are already in table A via the ID's, but reference the populating values from Table B. So that when you bring down the combobox you would be choosing from Table B data but populating table A with the ID and you would see a name there instead of an ID.[code] How do I populate my DS dataset with Table B? And how can I create a link to these two tables using a bound datagridview control?
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Aug 31, 2011
I know I have done this before and as I remember it should be really easy. But for some strange reason I can't do it now and I am about to jump off the building.I will make it simple:Two tables, one is just a list of products and their code.The other table: "details" has a field named product. I want to store only the code there.In the second table's entry form, I am putting a combobox. This combo box should display the list of products, their names, but depending on which one is selected, the code is what is passed to the table "details". Currently If I set the display member to product and the value member to code it still pases the product to the binded data source.
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Dec 6, 2010
I have a database that holds information about a particular job. One of those things is a customerID. CustomerID links to another table containing customer details. I have a combo box attached to a custom object that holds customerID as the valuemember and CustomerName as the displaymember.The JobDetails holds the customerID info. How do I set the default selection in the combobox based on the ValueMember of the combo box?
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Jun 2, 2011
how do I overcome it? I have created a class and compiled into .dll This code
[Code]...
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Aug 13, 2009
In Visual Studio 2008, if I do this:
[Code]....
Does anyone here know how to get the above to work WITHOUT warnings being generated?
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May 31, 2010
In the following code i get a warning at line 59:Warning 1: Access of shared member, constant member, enum member or nested type through an instance; qualifying expression will not be evaluated.and.. At line 78 I get this Warning:
Warning 2 Property 'SelectedCustomer' doesn't return a value on all code paths. A null reference exception could occur at run time when the result is used.
The program compiles and runs well, but i cant' undesrtand the reason for these warnings. Any Idea ?
1: Public Class Form1
2:
3: 'Form level members
4: Private objCustomers As New ArrayList
[code]....
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Jan 14, 2012
I have been battling with this problem for months with virtually no success. I am using Visual Studio 2008 Professional. The database is Microsoft SQL 2005.
I have two combo boxes - both bound to database tables. These are: Combo box 1 is for "VAT" and is bound to the VAT table. This table has 3 columns configured as shown below:
[Code]....
The commented out code was my pathetic attempt to put the Value member of one combo box into the display of the other. This obviously does not work and my web browser, when using Google, is full of purple headers showing the sites that I have visited looking for an answer.
When I have this working, I want to use the feature in a datagridview which may make a difference to how the problem is approached.
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Apr 28, 2011
Cannot appear to be able to get this function to not have the above error.Private Function GetIncidentActions(ByVal FromAgentID As Integer, ByVal ToAgentID As Integer, ByVal incidentAction As Integer, ByVal ActionDate As Date) As String
[Code]...
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Jul 24, 2009
I would like to create a windows form wher my user can select files to load into the program i have been "writing" for the last month @PEng1 and Deborahk and Doug_
I have three list boxes and i would like one to have a selection of drives in it, and then depending on which one is picked folders from that drive appear in listbox2 and then files from the folder picked appear in listbox3. then press go and whiring noises and a lot of smoke later an answer appears.[code]...
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Sep 12, 2011
I have an app which hangs in production periodically more frequently on some PC's than others. While trying to resolve this I have started to analyse the application using WIndows native debuggers, such as ntsd,which appear to throw up a large number of clr exceptions (first chance). While alot of these are handled in my code some appear to be related to issues with Windows binding. For example the exception' Cannot bind to the new display member' appear to occur when I assign a BO to the datasource of a bindingSource control while if I directly set the datasource of a UI control, which would have referred to the bindingSource, the message disappears.In all cases I would have the displaymember and valuemember set for my list controls before updating the bindingsource control's datasource.
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May 30, 2012
I have a small problem. DataGridViewComboBoxColumn display value from ValueMember and not from DisplayMember. The grid work fine and when I select somthing from this column I see DisplayMember value but when focus lost the grid show ValueMember. I have this code combo box column:
statusCBoxColumn.DataSource = dt 'datatable with two fields StatusId and StatusText
statusCBoxColumn.DisplayMember = "StatusText" 'is type NVarchar
statusCBoxColumn.ValueMember = "StatusId" 'is type Int
[Code]....
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Jun 10, 2010
i made a class which has speed,symbol (string "*") and location what is the acceptable way to actually display the class symbol property on the screen ?the class will be stored in a list<OF T> and will contains hundreds dynamically instances
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Jan 21, 2012
I have been battling with this problem for months with virtually no success.
I am using Visual Studio 2008 Professional. The database is Microsoft SQL 2005.
I have an unbound datagridview with two combo boxes � both bound to database tables. These are:
Combo box 1 is for VAT and is bound to the VAT table. This table has 3 columns configured as shown below[code]...
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Nov 9, 2009
Got this error: Error2'ListCount' is not a member of 'System.Windows.Forms.ListBox'.C:STRCC Network AdminNetworkAdminRoomPlan.vb522NetworkAdmin
When trying to do the following:
For i = 0 To ListBox1.ListCount - 1
Next
referecnes to System.Windows.Forms have been added
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Jul 15, 2010
I'm trying to concatenate two combobox display member values using the following code
Dim CB2DM As String = ComboBox2.DisplayMember
Dim CB1DM As String = ComboBox1.DisplayMember
TextBox8.Text = Join(CB2DM & " " & CB1DM)
I keep getting an error.
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Aug 7, 2010
Is it possible to select an item in one listbox and then display the data of another listbox with the same indexed position? I am planning a project and this is something I would like to attempt but I haven't figured out how to do it.[code..]
I tried doing the above code but instead of displaying the listbox text the message box just returned false.
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Jun 15, 2010
I am trying to display my data in datagridview. I created a class with different property and used its list as the datasource. it worked fine. but I got confused how to do that in case we have nested class.My Classes are as follows:
class Category
property UIN as integer
property Name as string
[code].....
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Jun 23, 2012
I enter Names and scores from a text box. Once i press "show me the array" my listbox gets populated with the names and scores. [code]...
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Nov 18, 2009
I'm "cloning" objects in my code. For instance: objClone = objOriginal My question is: Does the assignment operator in VB.NET 1.1 do a member-by-member copy of the objOriginal to objClone or does objClone simply point as a reference to memory referenced by objOriginal?
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Jun 23, 2009
i changed a class variable to shared so i can access it in all instances of the class, but it caused an error. what is causing this, and how can i fix it?
Private
Shared img As Bitmap
Me
.img = bgImage
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Apr 5, 2011
my homework question is to display the selected items from a listbox (multi-extended) in a label. I need to display all the selected names in a label. the simplest most uncluttered way of doing this. This is what I've got but it doesn't work.
[Code]...
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Jan 3, 2011
I get this error if I follow these steps: Change property Y of an object (an associated entity property)
Attempt to submit changes At this point the value of Y and the value of X (the underlying key) are not in agreement -- LINQ to SQL apparently doesn't synchronize these until GetChangeSet is called.An expected error occurs due to some business logic or database level constraint during the update operation.At this point the value of Y is in agreement with X because GetChangeSet was called.Change the value of Y to Nothing (aka null).Call GetChangeSet.
The error occurs on the last step because the value of X and the original value of X (returned by GetOriginalEntityState) are different, and the new value does not agree with Y? Is that why? Is this a bug in LINQ to SQL. Must be because I don't see the same behavior if I change Y to another (non-null) value instead during step 5. What's the right way around this? I can see a few ways:
Discard the DataContext when an error occurs and leave the UI as-is. I don't like this because then optimistic cocurrency change conflicts cannot be detected. The new context doesn't have the original values in it that were populated at the same time the UI was populated, so if the UI has any stale values in it, they will cause data in the database to revert.Refresh the datacontext (OverwriteCurrent) and leave the UI as-is. I don't like this for the same reason as #1.Refresh the datacontext (OverwriteCurrent) and re-populate the UI. I don't like this because then the error message just presented to the user does not show the user the error they made and allow them to correct it. It also discards all the other changes the user may have made.When the error occurs, explicitly retrieve the key for Y that corresponds to the original value of X and reset Y, then call GetChangeSet to re-synchronize X (X is read-only or private so I can't reset it directly). This seems to work, but seems like a hack, and may require lots of code for other similar errors.
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Apr 4, 2011
in VB.NET you implement an interface like this...
Sub SomeInterfaceMember()
Implements ISomeInterface.SomeInterfaceMember
End Sub
while in C# you do it explicitly like this (which can only be called via the interface)...
void ISomeInterface.SomeInterfaceMember(){}
or more simply, implicitly like this...void SomeInterfaceMember(){} // Note the name matches the interface member However, regarding VB, I can also do this...
Sub SomeRandomMemberName()
Implements ISomeInterface.SomeInterfaceMember
End Sub
In other words, the method that handles the implementation can have a completely different name than the interface's member name.I'm just wondering if there's something similar to this in C#. (Yes, I know I can simply do an explicit interface, then access it via another 'wrapper' member with a different name that simply delegates to it, but in VB.NET?
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Feb 10, 2009
I am using .net 2008. I have placed a ComboBox on the form and I do not have an additem.
[Code]...
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Feb 1, 2012
I can't get anything to display on the list box that I created named "depreciationListBox" I have been working on this project for a while and I am quite stumped.
Private Sub displayButton_Click(ByVal sender As Object, _
ByVal e As System.EventArgs) Handles displayButton.Click
Dim cost As Double
Dim life As Double = CDbl(lifeListBox.SelectedItem)
Dim period As Double
[Code] .....
[URL]
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Jan 11, 2010
how can i display all my process in a listbox , and close a process from selecting it from the listbox ?
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Apr 21, 2012
[Code]...
my design is attach! Attached image(s)
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Oct 17, 2011
So suppose there is a string: StringRamdom and you display it's contents in a listbox.
so listbox.Items. Add(StringRandom) but it should be displayed as A, B, C
not
A
B
C
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